using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data;
using cuidian.Sql;
using System.Data.SqlClient;

namespace TempDbToUfida.Sql
{
    /// <summary>
    /// 从中间库下载到U8数据库的基类
    /// </summary>
    public abstract class BaseDownLoad : IDownLoad
    {
        /// <summary>
        /// 中间库源数据
        /// </summary>
        protected DataSet _sourceData;

        /// <summary>
        /// 主表名称
        /// </summary>
        protected string _mainTable;

        protected SqlConnection _tragetCon;

        protected string _operType;

        public void DownLoad()
        {            
            _DownLoad();            
        }


        /// <summary>
        /// 初始化源数据
        /// </summary>
        protected virtual void _InitSourceData()
        { }

        public BaseDownLoad()
        {
            _Init();
            _InitSourceData();
        }

        protected virtual void _DownLoad()
        {
            DataTable dt = _sourceData.Tables[_mainTable];

            foreach (DataRow item in dt.Rows)
            {
                _Process(item);
            }
        }

        protected virtual void _Init()
        {
            _tragetCon = ConnectionUtils.Instance.GetConnection();
        }

        protected virtual void _Process(DataRow dr)
        { }

        /// <summary>
        /// 检查数据是否存在
        /// </summary>
        /// <param name="sql"></param>
        /// <returns></returns>
        protected bool _CheckDup(string sql)
        {
            int i = Convert.ToInt16(DbUtils.ExecuteScalar(sql, _tragetCon));

            return i > 0;
        }

        protected virtual void _updateTempDb(DataRow dr)
        { }

        protected virtual string _buildUpdSql(DataRow dr)
        {
            return string.Empty;
        }
    }
}